gpqr-play-beep-on-scan.js: Added snippet to play beep sound on successful QR Code scan.

gp-qr-code/gpqr-play-beep-on-scan.js

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+/**
+ * Gravity Perks // GP QR Code // Automatically Play Beep Sound on Successful Scan
+ * https://gravitywiz.com/documentation/gravity-forms-qr-code/
+ *
+ * When using the QR scanner, automatically play beep after a successful scan.
+ * 
+ * Instruction Video: https://www.loom.com/share/7f413231517b423eba3ccc1bf3055b40
+ *
+ * We recommend installing this snippet with our free Custom Javascript plugin:
+ * https://gravitywiz.com/gravity-forms-code-chest/
+ */
+function playBeep() {
+	var context    = new( window.AudioContext || window.webkitAudioContext )();
+	var oscillator = context.createOscillator();
+	var gainNode   = context.createGain();
+
+	oscillator.type = "square"; // Square wave for a more scanner-like sound.
+	oscillator.frequency.setValueAtTime( 800, context.currentTime ); // Frequency in Hz.
+	gainNode.gain.setValueAtTime( 0.5, context.currentTime ); // Adjust volume.
+
+	oscillator.connect( gainNode );
+	gainNode.connect( context.destination );
+
+	oscillator.start();
+
+	// Beep duration in milliseconds.
+	setTimeout( () => {
+		oscillator.stop();
+	}, 100 );
+}
+
+gform.addAction( 'gpqr_on_scan_success', function( decodedText, decodedResult, gpqr ) {
+	playBeep();
+} );